51861102 has 16 divisors (see below), whose sum is σ = 105423312. Its totient is φ = 17003520.

The previous prime is 51861097. The next prime is 51861119. The reversal of 51861102 is 20116815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70483 + ... + 71214.

It is an arithmetic number, because the mean of its divisors is an integer number (6588957).

Almost surely, 2^51861102 is an apocalyptic number.

51861102 is an abundant number, since it is smaller than the sum of its proper divisors (53562210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51861102 is a wasteful number, since it uses less digits than its factorization.

51861102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141763.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 51861102 is about 7201.4652675688. The cubic root of 51861102 is about 372.9184870768.

Adding to 51861102 its reverse (20116815), we get a palindrome (71977917).

The spelling of 51861102 in words is "fifty-one million, eight hundred sixty-one thousand, one hundred two".